[HN Gopher] Show HN: I Designed and Built an eBike
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Show HN: I Designed and Built an eBike
This post shows and explains the design of the eBike I built
myself. I decided to post it on this specific forum because this is
where it all started, by stumbling on another post, as mentioned in
my entry.
Author : gkasev
Score : 35 points
Date : 2022-02-23 21:46 UTC (1 hours ago)
(HTM) web link (endless-sphere.com)
(TXT) w3m dump (endless-sphere.com)
| ghostly_s wrote:
| So it drives the pedal shaft? Isn't that a safety hazard?
| KennyBlanken wrote:
| It looks like it has a chainring clutch, though without a
| chainguard cover, you have the risk of clothing, body parts,
| shoelaces, etc getting sucked into the chain, yeah.
|
| The motor sticks out uncomfortably close to the pedals and
| particularly on a MTB I could see a rider accidentally stepping
| on it...and it looks like an outrunner, so that would also be
| quite bad, as the foot would get launched backwards pretty
| violently.
|
| This is a lot of effort compared to just bolting on a Baofang
| mid-drive motor. The components are also placed such that
| unless you have a pretty good front fender, they'll be covered
| in crap in no time.
| slingnow wrote:
| Cool build, but it doesn't look like it would actually stand up
| to the typical stresses of mountain biking (rock strikes, water,
| mud, debris, etc). On super smooth singletrack I could see it
| being fun though.
| bri3d wrote:
| A few ideas:
|
| * A VESC based ESC instead of the HobbyWing one will give a lot
| more control and telemetry, including a phone app and detailed
| current use logging. I know from RC planes that HobbyWing ESCs
| are very high quality, but VESC is specifically written for drive
| systems and has a lot of features.
|
| * LiIon or LiFePO4 round cells are safer and more energy dense
| than LiPo pouch cells, at the expense of current sink capacity
| you don't need. They're also cheaper.
| vosper wrote:
| It's a conversion of an existing bike to be electric, right? Or
| did you design and build the frame, too? Either way, nice work!
|
| I think we're about to see a lot of innovation in scooter- and
| bike-adjacent mobility things - I don't mean the motors, but the
| frames etc... eg we might see more cargo e-tricycles?
| mdoms wrote:
| Why the no welding requirement?
| Hextinium wrote:
| They probably don't have access to a welder and so they can't
| weld. It looks like they have a router table and a sheet metal
| bender so that's what they used to make it.
| mft_ wrote:
| How are the mounting brackets made (or obtained)? You said you
| didn't want to CNC anything, but they look CNC or laser cut?
|
| Any estimates of your expected range?
| 2muchcoffeeman wrote:
| Is it weather proof? I guess not since the motor windings are
| exposed? Where did you get the sheet metal fabricated?
|
| Otherwise looks good!
|
| When I got a 3D printer it was amazing to be able to make my own
| designs, but I wish I had the capability to work with more
| durable materials.
| jstanley wrote:
| You mention a throttle - I had a skim but couldn't find anything,
| I wonder if you considered adding a pedal-assist system of some
| sort?
|
| I suppose a throttle is a much more direct connection between
| your mind and the motor control, unfortunately they are illegal
| in my country.
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(page generated 2022-02-23 23:00 UTC)